EHallPass is a digital hall pass system schools use to control and track when students leave class to use the bathroom. It logs where you go, how long you’re out, and can even limit how often you can use the bathroom. Students send a request to the teacher, and the teacher can accept/reject the students request. Imagine if a kid gotta take a shit or pee and the teacher rejects it saying "You ran out of passes" like what the fuck.
Sounds like they're conditioning kids to accept mass surveillance as something normal for when they become adults. This isn't the only app either I saw a few other ones being implemented in schools, I'll post them if I find them again.